If H is the unbalanced net uplifting head at a point and G is the specific gravity of the floor material, then the required theoretical thickness (t) of the impervious floor to resist uplift pressure is given by which formula?

Groynes are constructed for river bank protection. When a groyne is inclined downstream in the direction of flow, it is designated as a:

What is the available moisture depth for evapotranspiration in a root zone of 1 m depth soil, if the dry unit weight of soil is 1.5 g/cc, field capacity is 30%, and permanent wilting point is 10%?